I live in a apartment in which I have 4 medium(3 ft x 12 on average) size balconies. I've started growing vegetables in pots and they are doing well but I am interested to put some rise beds for better results. I have 2 questions 1). Is it a good idea to use rise bed? 2). If yes, is ready made rise beds available in market or we have to hire a carpenter?

I live in a apartment in which I have 4 medium(3 ft x 12 on average) size balconies. I've started growing vegetables in pots and they are doing well but I am interested to put some rise beds for better results. I have 2 questions 1). Is it a good idea to use rise bed? 2). If yes, is ready made rise beds available in market or we have to hire a carpenter?